Abstract: Embodiments of the present invention are directed to a method and apparatus for multiple battery cell management. In one embodiment, a solid state relay is used instead of a mechanical relay in a BMS. The SSR is smaller and faster than a mechanical relay, enabling smaller BMSs that more efficiently and safely manage battery cell charge. In another embodiment, a plurality of battery cells are connected to two rails, using four SSRs to control access to the battery cells. In one embodiment, a plurality of battery cells are grouped together and controlled as one module of a multi-module BMS. In one embodiment, each module has 10 battery cells in series. In one embodiment, the BMS controls 4 modules. In one embodiment, each module is controlled by control signals passing through logical gates. In another embodiment, each module is controlled by control signals passing through a programmed circuit.

Abstract: A flexible coupling system to connect two substantially axially aligned shafts, comprises coupling members mountable on the ends of each of the shafts with each coupling member having a drive face for engagement with the opposed drive face of the other coupling member to provide a torque transmitting connection. Each coupling member has a tubular extension extending away from the drive face with an inner axial surface engageable over the shaft and a distal end. A locking ring engageable with the distal end of each coupling member is provided. Each distal end and each locking ring are formed with one of an axially extending annular eccentric projection and an axially extending eccentric shoulder. The shoulder and projection are rotatable to interengage and lock with each other in an interference fit to lock the coupling members on the shaft.